Post on 31-Jan-2021
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International Journal of Chemical Studies 2020; 8(2): 304-309
P-ISSN: 2349–8528 E-ISSN: 2321–4902
www.chemijournal.com
IJCS 2020; 8(2): 304-309
© 2020 IJCS
Received: 05-01-2019
Accepted: 10-02-2019
Sunil Kumar Meher
M.Sc. Agricultural, Department
of Soil Science and Agricultural
Chemistry, C.O.A. I.G.K.V.
Raipur, Chhattisgarh, India
Vivek Singh
M.Sc. Agricultural, Department
of Soil Science and Agricultural
Chemistry, C.O.A. I.G.K.V.
Raipur, Chhattisgarh, India
Jyoti Bala
M.Sc. Agricultural, Department
of Soil Science and Agricultural
Chemistry, C.O.A. I.G.K.V.
Raipur, Chhattisgarh, India
Stanley Samuel
M.Sc. Agricultural, Department
of Soil Science and Agricultural
Chemistry, C.O.A. I.G.K.V.
Raipur, Chhattisgarh, India
Ritesh Motghare
M.Sc. Agricultural, Department
of Soil Science and Agricultural
Chemistry, C.O.A. I.G.K.V.
Raipur, Chhattisgarh, India
Dr. K. Tedia
Professor and Head, Department
of Soil Science and Agricultural
Chemistry, College of
Agriculture, I.G.K.V, Raipur,
Chhattisgarh, India
Corresponding Author:
Sunil Kumar Meher
M.Sc. Agricultural, Department
of Soil Science and Agricultural
Chemistry, C.O.A. I.G.K.V.
Raipur, Chhattisgarh, India
Assessment of spatial variability of soil fertility
status in KVK farm of Pahanda in Durg district,
Chhattisgarh using Gis-Gps
Sunil Kumar Meher, Vivek Singh, Jyoti Bala, Stanley Samuel, Ritesh
Motghare and Dr. K Tedia
DOI: https://doi.org/10.22271/chemi.2020.v8.i2e.8784
Abstract
The precise nutrient management is one of the most important and integral part of the modern-day
agriculture. For this to happen we have to know the spatial variability of soil fertility. In this study, all
soil physico-chemical properties (pH, EC, OC), Available macronutrients (N, P, K, S) and Available
micronutrients (B, Fe, Mn, Cu, Zn) status with their spatial variability in KVK farm of Pahanda was
quantified and based on their result soil fertility maps were prepared for respective nutrients using Arc-
GIS software. Total 52 soil samples from soil surface (0-15 cm) collected from the study area and
analyzed for these parameters. Soil reaction of the study area varied from neutral to saline range with EC
below
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Material and Methods
Study area
The study was carried out at KVK farm of Pahanda in Durg
district. It is situated in mid-eastern part of Chhattisgarh state
and comes under Chhattisgarh plains agro climatic zone. It
situated at the latitude 21.11˚N to 21.12˚Nand longitude
81.31˚E to 81.32˚Ewith altitude 311 meter above sea level.
The general climatic condition of Durg is sub-humid to semi-
arid as it located near the tropics of cancer. The soil of the
study area is dominantly black soil locally called as Kanhar
and it comes under the order of Vertisols.
Sample collection and analysis
Total 52 soil samples from surface layer (0-15cm) were
collected from the study area of about 52 acres. One samples
each from all plots in the farm and through random technique
from the rest of barren field area. GPS coordinate of all
sampling sites recorded using a hand held GPS device.
The collected soil samples were air dried after grinding with
wooden pestle and mortar, then sieved through 2-mm sieve,
labelled and stored. The samples were analyzed for 12
chemical parameters viz. pH by pH meter, electrical
conductivity (EC) by solu-bridge method (Jackson 1973),
organic carbon (OC) by method of Walkley and Black (1934),
available nitrogen (N) using method described by Subbiah
and Asija (1956), phosphorus (P) using method of Olsen et al.
(1954), available potassium (K) by method of Hanway and
Heidal, (1952) [5], available sulphur (S) by method of
Williams and Steinbergs (1959), available zinc (Zn), iron
(Fe), copper (Cu) and manganese (Mn) using DTPA
extractant method proposed by Lindsay and Norvell (1978) [9]
and available boron (B) using hot water extractant method
described by Berger and Troug (1944).
The analytical results of each soil sample was categorized as
low, medium and high categories for OC and macronutrients
and as deficient, moderate and sufficient for micronutrient
based on standard rating values.
Nutrient index values and fertility rating
Nutrient index value (NIV) was calculated from the number
or proportion of samples under low, medium and high
available nutrient status (Ramamoorthy and Bajaj 1969) [13].
i.e:
NIV =1 × PL + 2 × PM+ 3 × PH
100
Where, NIV = nutrient index value;
PL, PM, and PH are the percentage of soil samples falling in
the category of low, medium and high nutrient status
and given weightage of one, two and three respectively.
The index values are rated into various fertility categories viz.,
low (2.33) for OC and
available N, P and K.
For available S and micronutrients, the ratings are very low
(2.66). Based on
this value farm categorized into various fertility class.
Generation of fertility maps
Database on soil available nutrient was generated in Microsoft
Excel based on test result. Using these database and GPS
location of sample sites soil fertility maps were prepared at
Geo-Informatics laboratory of IGKV, Raipur using Arcgis
10.3.1 software.
Result and Discussion
Soil reaction
soil reaction of the study varied from 6.79 to 7.81 in a very
narrow range with mean value of 7.36 and out of all 52
samples 63.46% were found within neutral, and rest 36.54%
fall under saline reaction category (Fig: 1). It might be due to
vertisols dominant soil and semi-arid climate of the region
(Balakrishna et al. 2017) [1].
Electrical conductivity
The electrical conductivity of the soil water suspension ranges
from 0.15 to 0.33 dS/m in soil of study area with a mean
value of 0.24 dS/m. All the collected soil samples fall under
normal E.C. (
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Fig 3: Organic Carbon Fig 4: Available Nitrogen
Organic carbon
Organic Carbon content in study area ranges from 0.27 to
0.71% with a mean value of 0.48%. From all collected soil
samples 67.31% samples fall under low and rest 32.69%
under medium fertility category (Fig: 3). It may be ascribed
due to the fact that soils have very low carbon pool and high
C decomposition due to warm climate (Jatav et al. 2012).
Available nitrogen
Available N content in soil of study area ranges from 87.81 to
200.70 kg/ha with mean value of 133.40 kg/ha. Also all
collected samples fall under low fertility category
(Fig: 4). It may be ascribed to the poor organic carbon pool of
soil (Jatav et al. 2012)
Available phosphorus
Available P content in KVK farm of Pahanda found to be
varied from 2.69 to 11.65 kg/ha with average content of 6.44
kg/ha with 100% collected soil samples representing low
fertility status (Fig: 5). It might be due to poor C pool and
fixation by montmorillonitic clay of the soil in the region
(Singh et al. 2017).
Available potassium
Soil available K status ranges from 283.47-538.72 kg/ha with
mean value of 376.53 kg/ha. Among all the collected soil
samples 36.54% samples were in medium and rest 63.46%
samples were in high fertility categories (Fig: 6) indicating
there is no K deficient area within study area.
Fig 5: Available Phosphorus Fig 6: Available Potassium
Available Sulphur
Available S status was found to be ranging between 11.20 to
39.60 kg/ha with a mean content of 27.27 kg/ha. Also it was
found that among all collected samples 28.85% in low,
51.92% in medium and 19.23% samples in high fertility
category (Fig: 7).
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Fig 7: Available Sulphur Fig 8: Available Boron
Available boron
Hot water extractable B content in the study area found to be
ranges from 0.10 to 1.00 mg/kg with a mean value of 0.54
mg/kg soil. Also, among the total samples collected 36.54%
samples found in lower and rest 63.46% in medium fertility
status (Fig: 8).
DTPA extractable micronutrients
Available Fe content in the study area found to be ranging
from 7.40 to 17.02 mg/kg with mean value of 9.52 mg/kg. Of
all collected samples 42.31% samples were found in medium
and 57.69% in high fertility category (Fig: 9).
Available Mn content in all soil samples were in medium to
sufficient category with its content found to be within 5.02 to
12.55 mg/kg with a mean value of 8.14 mg/kg of soil (Fig:
10) in the study area.
Available Cu content in study area found to be ranges from
0.25 to 2.22 mg/kg with a mean value of 0.78 mg/kg. Also, it
was found that 11.54% samples were in medium and rest
88.46% in high fertility category (Fig: 11).
Available Zn content in study area found to be ranges from
0.10 to1.16 mg/kg with a mean value of 0.46 mg/kg. Also, it
was found that 82.69% samples were in deficient and 17.31%
samples in medium fertility category (Fig: 12).
Fig 9: Available Iron Fig 10: Available Manganese
Fig: 9 Available Iron Fig: 10 Available Manganese
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Fig 11: Available Copper Fig 12: Available Zinc
Nutrient management & fertilizer recommendation
Based on the result obtained from this study and fertility maps
prepared based on it better nutrient management practices
taken up to avoid imbalance fertilizer application and improve
crop production.
As KVK farm is an extensive area where a lot of crop plants
are cultivated based on their nutrient requirement proper input
should be provided. For crop plants, in the deficient, sufficient
and high fertility area of a particular nutrient 25% more than
recommended, exact recommended and 25% less than
recommended dose of fertilizer respectively should be
provided. But for fruit and plantation crop nutrient uptake
should be correlated with soil nutrient and accordingly
nutrient should be applied to soil of the area.
Table 1: Soil Fertility Status of KVK Farm, Pahanda, Durg
S. No. Soil Characteristics Range Average Standard Deviation % Samples Category
NIV Fertility Rating Low Medium High
1 pH 6.79-7.81 7.36 0.27 - - - - -
2 EC (dS/m) 0.15-0.33 0.24 0.03 - - - - -
3 OC (%) 0.27-0.71 0.46 0.11 67.31 32.69 0.00 1.33 Low
4 N (kg/ha) 87.81-200.70 133.40 29.08 100.00 0.00 0.00 1.00 Low
5 P (kg/ha) 2.69-11.65 6.44 2.69 100.00 0.00 0.00 1.00 Low
6 K (kg/ha) 283.47-538.72 376.53 70.03 0.00 36.54 63.46 2.63 High
7 S (kg/ha) 11.20-39.60 27.27 7.89 28.85 51.92 19.23 1.90 Marginal
8 Fe (ppm) 7.40-17.02 9.52 2.01 0.00 42.31 57.69 2.58 High
9 Cu(ppm) 0.25-2.22 0.78 0.40 0.00 11.54 88.46 2.88 Very High
10 Mn (ppm) 5.02-12.55 8.14 1.89 0.00 25.00 75.00 2.75 Very High
11 Zn (ppm) 0.10-1.16 0.46 0.23 82.69 17.31 0.00 1.17 Very Low
12 B (ppm) 0.10-1.00 0.54 0.22 36.54 63.46 0.00 1.63 Very Low
Conclusions
From the above intensive study of the KVK farm in Pahanda,
Durg of Chhattisgarh it can be concluded that the soil of area
found to be in neutral reaction range with conductivity less
than 1 dS/m implied that soil suitable for cultivation of the
most of crop plants without major problem.
Soil found to be low to medium in organic C and completely
deficient in available N and P. But soil K found to be in
medium to high status. Fe, Mn and Cu status of study area
found to be in medium to high but Zn and B in deficient
condition. Also, the fertility maps prepared were very helpful
in spatial fertility management in the farm area.
Acknowledgements
The authors gratefully acknowledge the Department of Soil
Science and Agriculture Chemistry, COA, Raipur (I.G.K.V.)
and Krishi Vigyan Kendra, Pahanda, Durg for implementing
the project and providing all the support & facilities for
carrying out the research work.
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